1. Department of Archaeology and Anthropology, University of Wisconsin-La Crosse, La Crosse, Wisconsin 54601, United States
2. Departments of Chemistry and History, Université de Sherbrooke, Sherbrooke, QC, Canada J1K 2R1
3. Department of Sociology and Anthropology, Muhlenberg College, Allentown, Pennsylvania 18104, United States
4. Department of Chemistry, Eastern Michigan University, Ypsilanti, Michigan 48197, United States
5. Department of Anthropology, Michigan State University, East Lansing, Michigan 48824, United States